That ominous glow of the check engine light can be unsettling for any driver. It signals that something is amiss with your vehicle, and while it might induce panic, it doesn’t always necessitate an immediate trip to the mechanic. With the right tool and a little know-how, you can take control of the situation. This guide will walk you through using an OBD scanner to clear code and turn off that pesky check engine light, potentially saving you time and money.
The key to clearing a check engine light yourself is an OBD2 scanner, often called an OBDII reader or diagnostic scanner. It’s important to note that not all code readers are created equal. Some basic models only read trouble codes, while others, crucially, have the capability to erase them. To effectively clear code and switch off your check engine light, ensure your scanner has this function.
A reliable option is the CGSULIT SC301 OBDII reader, known for its user-friendly interface and code clearing capabilities. You can delve deeper into its features by reading a review or watching a video demonstration online.
Step-by-Step Guide: How to Clear Codes with an OBD Scanner
While prior experience with an OBD scanner can be beneficial, it’s not essential. This guide is designed for beginners to confidently clear code and address their check engine light. If you are entirely new to using a scanner, additional resources are available to help you familiarize yourself with the basics of OBD2 scanner operation.
1. Locate the OBDII Port
The first step to clear code is finding your vehicle’s OBDII port. This diagnostic port is typically located under the dashboard on the driver’s side. Check under the steering column or in the area beneath the dashboard near your knees. It is usually easily accessible and not hidden behind panels.
2. Connect the OBD Code Reader
Once you’ve located the OBDII port, firmly plug your OBD scanner into it. Ensure it’s securely connected to establish a proper communication link with your vehicle’s computer system.
3. Turn On the Ignition
Turn your car’s ignition to the “ON” position. This means turning the key to the point where the dashboard lights illuminate, but without actually starting the engine. This powers up your car’s computer and allows the OBD scanner to access the necessary data to clear code.
4. Let the OBD Code Reader Perform a Scan
With the scanner connected and the ignition on, navigate the scanner’s menu to initiate a scan. The OBD scanner will then communicate with your car’s computer to retrieve any stored trouble codes. This process might take a few moments as the scanner diagnoses your vehicle’s systems to identify the cause of the check engine light.
5. Read and Interpret the Error Code
After the scan, the OBD scanner will display a list of error codes. There could be one or multiple codes, each representing a specific issue. This step is crucial: before you clear code, you must understand what these codes signify.
Interpreting the error codes correctly is vital. It informs you about the nature and severity of the problem triggering the check engine light. A minor, temporary issue might cause the light, but it could also indicate a more significant problem that requires attention. While clearing the code will turn off the light, it doesn’t fix the underlying issue. If the problem persists, the check engine light will likely reappear after you clear code.
Many OBD scanners have a built-in code library for quick lookups. Alternatively, you can easily search for the codes online using your phone or computer to understand their meaning.
6. Go Through the Menu and Select to Clear the Check Engine Light
Once you’ve reviewed and understood the error codes, and if you deem it appropriate to clear code (perhaps after addressing a minor issue or for diagnostic purposes), navigate your OBD scanner’s menu to find the “clear codes” or “erase codes” option.
Scanner menus are generally user-friendly and intuitive. After locating the clear code command, select it and confirm your choice if prompted. The scanner will then send a command to your vehicle’s computer to reset the system and clear code.
7. Return to the Homepage
After successfully issuing the clear code command, use the “escape” or “return” button on your OBD scanner to go back to the main menu. This ensures the clearing process is complete and the scanner is ready for disconnection.
8. Disconnect the OBD Code Reader
Carefully disconnect the OBD scanner from the OBDII port. Handle the connector gently to avoid damaging either the scanner or the vehicle’s port. If your OBD scanner has a power button, turn it off before disconnecting.
9. Turn Off the Ignition
Turn the ignition key back to the “OFF” position, completely powering down your vehicle’s electrical systems.
10. Start the Engine and Check If the Light is Gone
Finally, start your engine as you normally would. Check your dashboard – the check engine light should now be off. Let the engine run for a bit to reach operating temperature, and you can even restart it a few times to confirm the check engine light remains off.
Conclusion
As you’ve seen, using an OBD scanner to clear code and turn off the check engine light is a straightforward process. It typically takes just a few minutes, making it a convenient DIY task for car owners. Mastering this skill empowers you to address minor car issues yourself and understand your vehicle better.
However, remember that simply clearing the code is a temporary solution. It’s crucial to understand the underlying cause of the check engine light. Always prioritize diagnosing and fixing the root problem, especially if the error code indicates a serious issue. Clearing codes is a valuable tool, particularly after completing DIY repairs, ensuring that the check engine light doesn’t remain on unnecessarily after you’ve resolved the problem.
